KR20200122753A - Apparatus for checking multi circuit breaker - Google Patents

Abstract

The present invention relates to a multi-circuit breaker test device including: a power supply unit receiving commercial power input and generating and outputting DC drive power for driving the multi-circuit breaker test device; a current generating circuit unit generating a specified level of phase current from the commercial power; a voltage generating circuit unit generating a specified level of phase voltage from the commercial power; a state lamp unit displaying the operating state of the multi-circuit breaker test device through a lamp so as to correspond to a function switch selected by a user; a signal transmission circuit unit connected to an internal circuit breaker circuit unit of a multi-circuit breaker to be tested through a test cable and performing signal transmission; a closing/opening control circuit unit generating a closing control signal and transmitting it to the multi-circuit breaker as the user inputs a closing switch formed on a panel of the multi-circuit breaker test device and generating an opening control signal and transmitting it to the multi-circuit breaker as a result of opening switch input; a state match confirmation circuit unit displaying, through a lamp, whether the state of the multi-circuit breaker as a result of the closing or opening switch input matches the state of the multi-circuit breaker test device; and a current generation operation circuit unit inputting a current generated through the current generating circuit unit to the multi-circuit breaker to be tested as the user inputs a test switch formed on the panel of the multi-circuit breaker test device.

Description

Multi-circuit breaker test device {APPARATUS FOR CHECKING MULTI CIRCUIT BREAKER}

The present invention relates to a multi-circuit breaker test apparatus, and more particularly, a multi-circuit breaker capable of collectively testing the opening/closing part circuit and the blocking part circuit of a multi-circuit breaker for power distribution with different specifications by year of manufacture or manufacturer. It relates to a test device.

In general, a power distribution system consists of a power distribution switch, a control terminal device, and a main device for remote monitoring and control thereof installed on a 22.9kV special high voltage distribution line, and acquires and uses various data of a distribution line through data communication. Thus, the distribution system is monitored and managed.

Accordingly, in order to comprehensively determine the state of the battery-enabled switching device and the control terminal device, and to take appropriate measures according to the state, it is necessary to maintain an operable state at all times through precise preventive inspection.

Here, the battery-enabled opening and closing device refers to a switch and a protective device (i.e., a recloser, a multi-circuit breaker), and is composed of a main body and an operation unit, and the switch is provided with a separate control terminal device, and the protection device (Recloser, Multi-circuit breaker) has a built-in control terminal function.

Among them, the multi-circuit breaker is a protection device installed and used in an underground distribution line, and is an integrated circuit breaker and switch having both the functions of an automobile breaker for an underground distribution line and a multi-circuit switch. Therefore, when a fault occurs in the line, it cooperates with the post protection device (substation CB) to automatically cut off the fault current, and when necessary, it simultaneously performs the function of opening and closing the load of the distribution line. Unlike a Recloser (automatic recloser), which is an overhead line protection device, the multi-circuit breaker blocks fault current without reclosing.

Here, the circuit configuration of the multi-circuit breaker is installed by combining a blocking unit circuit for directly blocking a fault current and an opening/closing unit circuit for opening and closing the load current according to the purpose of use.

For reference, since it is impossible to check the circuit breaker out of the circuit configuration of the multi-circuit breaker by the existing multi-circuit switch inspection device, the inspection of the multi-circuit breaker includes the cut-off circuit test item and the switch circuit test item. It should be implemented so that it can be tested at the same time.

Meanwhile, the number of multi-circuit breakers installed on distribution lines reaches 1,200 units, and the number of installations has increased by more than 25% every year due to the recent increase in the underground rate.

However, the multi-circuit breaker does not have a multi-circuit breaker inspection device due to the diversity of circuit configurations and different specifications for each manufacturer and year of manufacture (e.g., pin arrangement, connection terminals, open/close drive control method, size of input voltage, etc.). State. Accordingly, it is currently the only battery-enabled switchgear that cannot perform precise preventive inspections.

As described above, the facility installed by investing a huge budget for the soundness of the distribution line is operated without proper inspection measures such as preventive inspection, so when a simple failure occurs, the cost of maintaining the power distribution system by replacing it with a new operation unit, and the distribution line There is a problem of a malfunction in which the original function of detecting and blocking a fault current is not performed when a fault occurs in the furnace, and a malfunction of performing a blocking operation even though it is not a malfunction of an actual distribution line.

The background technology of the present invention is disclosed in Korean Patent Publication No. 10-2013-0099737 (published on September 6, 2013, multifunctional vacuum circuit breaker tester).

According to an aspect of the present invention, the present invention was created to solve the above problems, and the opening and closing circuit and the blocking circuit of the multi-circuit breaker for power distribution with different specifications by manufacturing year or manufacturer are collectively tested. It is an object of the present invention to provide a multi-circuit breaker test apparatus.

A multi-circuit breaker test apparatus according to an aspect of the present invention includes: a power supply unit receiving commercial power and generating and outputting DC driving power for driving the multi-circuit breaker test apparatus; A current generation circuit unit generating a phase current of a specified level from the commercial power supply; A voltage generation circuit unit generating a phase voltage of a specified level from the commercial power supply; A state lamp unit for displaying an operation state of the multi-circuit breaker test apparatus through a lamp in response to a function switch selected by a user; A signal transmission circuit unit connected through a test cable and an internal breaker circuit unit of the multi-circuit breaker to be tested to transmit signals; The user generates a closing control signal according to the input of the closing switch formed on the panel of the multi-circuit breaker test device and delivers it to the multi-circuit breaker, and generates an open control signal according to the open switch input and delivers it to the multi-circuit breaker. Control circuit section; A state match checking circuit unit which displays through a lamp whether the state of the multi-circuit breaker according to the input of the closing switch or the open switch and the state of the multi-circuit breaker test apparatus are identical; And a current generating operation circuit unit for inputting the current generated through the current generating circuit unit to the multi-circuit breaker to be tested according to a test switch input formed on the panel of the multi-circuit breaker test apparatus.

In the present invention, the panel of the multi-circuit breaker test apparatus includes a time measurement display unit, an output phase voltage display unit, an output current display unit, an external voltage display unit, a phase voltage adjustment switch, a phase voltage ON lamp, a phase current selection switch, a test switch, and a current. It characterized in that it comprises a control switch, a commercial power input unit, a power switch, a gas low switch, a main body ground switch, a close switch, an open switch, and a test cable connection terminal.

In the present invention, the constant voltage control switch changes the voltage in three phases collectively, the current control switch controls the current in units of [mA] for each phase, and the test switch is a time set in the multi-circuit breaker to be tested. -The current adjusted in consideration of the current curve and the minimum operating current is applied to the multi-circuit breaker to be tested, and the time measurement display unit performs a blocking operation in response to the fault current adjusted to a specific value specified by the multi-circuit breaker to be tested. When this occurs, the cut-off time measured in [ms] is measured and displayed, the GAS LOW switch checks the decrease in gas pressure of the multi-circuit breaker under test, and the main body grounding switch checks whether the multi-circuit breaker under test is grounded. In addition, the closing switch and the open switch are characterized in that the opening and closing of the multi-circuit breaker to be tested and the opening and closing of the cut-off circuit are controlled, and the status thereof is displayed using a lamp.

In the present invention, the function switch and the lamp (LAMP) are characterized in that it is implemented in one piece.

In the present invention, the test cable is a cable connecting the multi-circuit breaker to be tested and the multi-circuit breaker test apparatus, and is implemented as a receptacle including at least 37 terminals, by manufacturer of the multi-circuit breaker to be tested, and It is characterized by including a plurality of signal conversion test cables in consideration of different specifications for each manufacturing year.

According to an aspect of the present invention, the present invention enables the integrated test of the opening/closing part circuit and the blocking part circuit of a multi-circuit breaker for power distribution with different specifications by year of manufacture or manufacturer, so that it is required to check the multi-circuit breaker. It allows you to save time and money.

1 is an exemplary view showing a schematic configuration of a multi-circuit breaker test apparatus according to an embodiment of the present invention.
2 is an exemplary view showing a shape of a front panel according to an embodiment of the apparatus for testing a multi-circuit breaker in FIG. 1.
3 is an enlarged view of the shape of the test cable connection terminal in FIG. 2.
4 is an exemplary view showing the shape of a test cable for each type of a multi-circuit breaker connected to the multi-circuit breaker test apparatus in FIG. 2;

Hereinafter, an embodiment of a multi-circuit breaker test apparatus according to the present invention will be described with reference to the accompanying drawings.

In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

1 is an exemplary view showing a schematic configuration of a multi-circuit breaker test apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the multi-circuit breaker test apparatus 100 according to the present embodiment includes a power supply unit 110, a current generation circuit unit 120, a voltage generation circuit unit 130, and a status lamp (LAMP) unit ( 140), a signal transmission circuit unit 150, a closing/opening control circuit unit 160, a state match checking circuit unit 170, and a current generation operation circuit unit 180.

The power supply unit 110 generates driving power (ie, DC power) for driving the multi-circuit breaker test apparatus 100 according to the present embodiment. The power supply unit 110 receives commercial power (eg, AC 220V), converts it into DC power at a level for driving the multi-circuit breaker test apparatus 100 according to the present embodiment, and outputs it as a driving power.

The current generating circuit unit 120 receives commercial power (eg, AC 220V) and generates and outputs a current of a specified level (eg, A phase, B phase, C phase).

At this time, in this embodiment, each phase current can be adjusted from 0mA to 1,800mA.

However, it is not intended to limit the generated current.

The voltage generation circuit unit 130 receives commercial power (eg, AC 220V) and generates and outputs a phase (eg, A phase, B phase, C phase) voltage of a specified level.

At this time, in this embodiment, each phase voltage can be adjusted from AC 0V to 9V.

However, it is not intended to limit the generated voltage.

The current generating circuit unit 120 and the voltage generating circuit unit 130 generate voltage or current for testing (or checking) the multi-circuit breaker according to a user's setting.

The status lamp unit 140 displays the operation status of the multi-circuit breaker testing apparatus 100 according to the present embodiment through a lamp LAMP in correspondence to any one function switch (or button) selected by the user. In this case, the function switch (eg, a push button) and a lamp (LAMP) may be implemented integrally.

In order to generate a voltage or current for testing (or checking) the multi-circuit breaker, a switch for controlling the current generating circuit unit 120 and the voltage generating circuit unit 130 (for example, a variable switch, a rotary switch), And the function switch (eg, a push button) and a lamp (LAMP) may be implemented in a panel shape as shown in FIG. 2.

2 is an exemplary view showing a shape of a front panel according to an embodiment of the apparatus for testing a multi-circuit breaker in FIG. 1.

Meanwhile, the signal transmission circuit unit 150 is connected to an internal breaker circuit unit (not shown) of a multi-circuit breaker (not shown) to be tested (or inspected) through a test cable to transmit signals to each other (see FIGS. 3 and 4). .

3 is an exemplary view showing an enlarged shape of a test cable connection terminal in FIG. 2, and FIG. 4 is a diagram showing the shape of a test cable for each type of a multi-circuit breaker connected to the multi-circuit breaker test apparatus in FIG. 2 It is an exemplary diagram.

Referring back to FIG. 1, the closing/opening control circuit unit 160 generates a closing control signal according to a user's closing switch input in the panel shown in FIG. 3 and transmits it to a multi-circuit breaker (not shown), and The panel shown in FIG. 3 generates an open control signal according to the user's open switch input and transmits it to a multi-circuit breaker (not shown).

The state match check circuit unit 170 operates (ie, closed or open) according to the input of the close/open switch as described above, so that the multi-circuit breaker (not shown) and the present implementation It is displayed on the lamp so that the user can check whether the state of the multi-circuit breaker test apparatus 100 according to the example matches.

The current generation operation circuit unit 180, as the user inputs the test switch (or test button) shown in FIG. 3, the voltage or current set through the current generation circuit unit 120 and the voltage generation circuit unit 130 Is inserted (or applied) to the multi-circuit breaker (not shown) to be tested.

2, the panel of the multi-circuit breaker test apparatus 100 according to the present embodiment includes a time measurement display unit (eg, LCD Display), an output phase voltage display unit (eg, 7 segments), and an output current display unit (eg: 7 segments), external voltage display (ex: 7 segments), phase voltage adjustment switch, phase voltage ON lamp, phase current selection switch, test switch, current adjustment switch, commercial power (AC 220V) input, power switch, GAS LOW switch, It includes a main body grounding switch, a closing switch, an open switch, and a test cable connection terminal (or receptacle terminal).

Here, the constant voltage adjustment switch changes the voltage in three phases collectively.

The current adjustment switch controls the current in units of [mA] for each phase. At this time, the controlled current can be tested by selectively applying normal current and fault current according to the type of multi-circuit breaker.

The test switch is a button that applies a controlled current (that is, a test current set as a normal current or a fault current) to the multi-circuit breaker under test in consideration of the time-current curve set in the multi-circuit breaker under test and the minimum operating current. to be.

The time measurement display unit is measured in [ms] to verify whether the blocking operation has been performed according to the specified Time-Current Curve characteristic in response to the fault current adjusted to a specific value according to the multi-circuit breaker to be tested. Time is measured and displayed.

The GAS LOW switch checks the decrease in gas pressure of the multi-circuit breaker under test, and the main body grounding switch checks whether the multi-circuit breaker under test is grounded.

The closing switch and the open switch control the opening and closing of the opening and closing part and the cut-off part circuit of the multi-circuit breaker to be tested, and display the corresponding state using a lamp.

Referring to FIG. 3, a test cable connecting the multi-circuit breaker to be tested and the multi-circuit breaker test apparatus 100 according to the present embodiment uses a receptacle terminal including at least 37 terminals. However, since the multi-circuit breaker to be tested is configured with different specifications (e.g., pin arrangement, connection terminal, control method of opening/closing driver, size of input voltage, etc.) by manufacturer and year of manufacture, it is for signal conversion as shown in FIG. The multi-circuit breaker to be tested and the multi-circuit breaker test apparatus 100 according to this embodiment are connected using a test cable.

As described above, the multi-circuit breaker test apparatus 100 according to the present embodiment can check the closed/open state of the multi-circuit breaker to be tested, each phase current and voltage, gas pressure drop, and the main body grounding state.

In addition, the multi-circuit breaker test apparatus 100 according to the present embodiment may measure and display a Time-Current Curve characteristic test (ie, trip time for each curve type) of the multi-circuit breaker to be tested.

In addition, the multi-circuit breaker test apparatus 100 according to the present embodiment may perform fault detection and interruption tests (eg, phase and ground fault temporary and instantaneous FI, minimum operating current and inrush current suppression, etc.).

Here, among the above test items, the Time-Current Curve characteristic test is to check the core function of the multi-circuit breaker that blocks fault current in case of line failure.

The Time-Current Curve is an inversely proportional curve graph in which the blocking time becomes shorter as the fault current increases. The X axis represents the magnitude of the fault current (=X multiple of the minimum operating current), and the Y axis represents the blocking time.

For reference, the Time-Current Curve is diverse in a total of 40 types, and by selectively operating the Time-Current Curve suitable for the characteristics of the distribution line with the multi-circuit breaker installed, it is possible to reduce the failure section through protection cooperation with the substation CB, which is a post-protection device. do.

In addition, since the multi-circuit breaker test apparatus 100 according to the present embodiment is capable of generating a variable fault current (ie, current adjustment), not a fault current fixed to a predetermined size, time- It is possible to perform a test that applies a finely adjusted fault current corresponding to the current curve and the minimum operating current. In addition, not only simply determining whether to trip according to the fault current, but also measuring and accurately recording the time until the interruption, whether the interruption operation is performed in accordance with the operating Time-Current Curve Type and whether protection cooperation with the substation CB is possible. It has the effect of being able to verify.

As described above, the multi-circuit breaker test apparatus 100 according to the present embodiment integrates a multi-circuit breaker that is not standardized, that is, a multi-circuit breaker for various underground distribution lines with different specifications by manufacturer, year of manufacture, and circuit configuration. By testing it, there is an effect of increasing the efficiency of the failure prevention inspection and reducing the time and cost required for inspection.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but these are only exemplary, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand the point. Therefore, the technical protection scope of the present invention should be determined by the following claims. Also, the implementation described herein may be implemented as, for example, a method or process, an apparatus, a software program, a data stream or a signal. Although discussed only in the context of a single form of implementation (eg, only as a method), the implementation of the discussed features may also be implemented in other forms (eg, an apparatus or program). The device may be implemented with appropriate hardware, software and firmware. The method may be implemented in an apparatus such as a processor, which generally refers to a processing device including, for example, a computer, microprocessor, integrated circuit or programmable logic device, or the like. Processors also include communication devices such as computers, cell phones, personal digital assistants ("PDAs") and other devices that facilitate communication of information between end-users.

100: multi-circuit breaker test device
110: power supply
120: current generating circuit part
130: voltage generating circuit part
140: status lamp unit
150: signal transmission circuit part
160: close/open control circuit part
170: state match check circuit
180: current generation operation circuit part

Claims (5)

A power supply unit receiving commercial power and generating and outputting DC drive power for driving the multi-circuit breaker test device;
A current generation circuit unit generating a phase current of a specified level from the commercial power supply;
A voltage generation circuit unit generating a phase voltage of a specified level from the commercial power supply;
A state lamp unit for displaying an operation state of the multi-circuit breaker test apparatus through a lamp in response to a function switch selected by a user;
A signal transmission circuit unit for transmitting a signal by being connected to an internal breaker circuit unit of the multi-circuit breaker to be tested and a test cable;
The user generates a closing control signal according to the input of the closing switch formed on the panel of the multi-circuit breaker test device and delivers it to the multi-circuit breaker, and generates an open control signal according to the open switch input and delivers it to the multi-circuit breaker. Control circuit section;
A state match checking circuit unit which displays through a lamp whether the state of the multi-circuit breaker according to the input of the closing switch or the open switch and the state of the multi-circuit breaker test apparatus are identical; And
A multi-circuit breaker comprising: a current generating operation circuit unit for inputting the current generated through the current generating circuit unit to the multi-circuit breaker under test according to an input of a test switch formed on a panel of the multi-circuit breaker test apparatus. tester.
The method of claim 1, wherein the panel of the multi-circuit breaker test apparatus,
Time measurement display, output phase voltage display, output current display, external voltage display, phase voltage adjustment switch, phase voltage ON lamp, phase current selection switch, test switch, current adjustment switch, commercial power input, power switch, gas low switch, main body A multi-circuit breaker test apparatus comprising a ground switch, a close switch, an open switch, and a test cable connection terminal.
The method of claim 2,
The constant voltage adjustment switch changes the voltage in three phases collectively,
The current adjustment switch controls the current in [mA] units for each phase,
The test switch applies the controlled current to the multi-circuit breaker to be tested in consideration of the time-current curve and the minimum operating current set in the multi-circuit breaker to be tested,
The time measurement display unit measures and displays the cut-off time measured in [ms] when the cut-off operation is performed in response to the fault current adjusted to a specific value specified according to the multi-circuit breaker to be tested, and
The GAS LOW switch checks the decrease in gas pressure of the multi-circuit breaker to be tested,
The main body earthing switch checks whether the main body of the multi-circuit breaker to be tested is earthed,
The closing switch and the open switch are multi-circuit breaker testing apparatus, characterized in that for controlling the input and opening of the opening and closing part and the cut-off part circuit of the multi-circuit breaker to be tested, and displaying a corresponding state using a lamp.
The method of claim 1,
The multi-circuit breaker test apparatus, characterized in that the function switch and the lamp (LAMP) are implemented integrally.
The method of claim 1, wherein the test cable,
A cable connecting the multi-circuit breaker to be tested and the multi-circuit breaker test device, which is implemented as a receptacle including at least 37 terminals,
A multi-circuit breaker test apparatus comprising a plurality of signal conversion test cables in consideration of different specifications for each manufacturer and year of manufacture of the multi-circuit breaker to be tested.

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